NVIDIA Quadro P400 Test Problem

When testing NVIDIA Quadro P400, after closing any control window, the interface still has residual windows. How to solve it?
Test environment:

  1. Operating system: rhel7.4
  2. Video card driver: NVIDIA-Linux-x86_64-430.34.run
  3. FVWM window manager: fvwm-2.6.8. tar.gz

What do you mean by “the interface still has residual windows”? What control windows?

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